首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 140 毫秒
1.
随着我国步入老龄化社会,骨质疏松症的患病率明显升高。骨质疏松症最严重的危害来自骨质疏松性骨折,绝经后女性尤其多见。由于脊柱独特的解剖学和生物力学特点,骨质疏松患者更易发生椎体骨折。骨密度测量是诊断骨质疏松的金标准。本文通过回顾近年来相关文献,探讨腰椎体骨密度检测对绝经后女性骨质疏松性椎体骨折的意义,发现:绝经后骨质疏松性椎体骨折患者的BMD水平比绝经后骨质疏松症但无脊椎骨折者明显减少;绝经后骨质疏松症患者的BMD水平越低,其发生椎体骨折的风险越高;有椎体骨折史的绝经后骨质疏松症患者的BMD水平与发生再次椎体骨折的风险呈负相关。药物干预通常可明显提高绝经后骨质疏松症患者的BMD水平,同时还可减少椎体骨折的发生。尚存在一些不足:腰椎骨密度可能出现假性增高;需进一步探讨预测骨质疏松性椎体骨折的骨密度阈值;药物干预的研究中BMD水平与椎体骨折发生的相关性并没有得到深入研究;缺少大规模的绝经后骨质疏松性椎体骨折的流行病学,现有研究也大都存在病例收集方法不规范、样本量小、年龄分布存在差异等不足。对绝经后骨质疏松性椎体骨折的深入研究需要多学科共同协作。  相似文献   

2.
目的应用骨折风险评估工具(FRAX)预测不同骨质疏松性骨折危险因子及股骨颈骨密度(BMD)情况下10年骨折风险性的差异,探讨筛查骨质疏松高危人群的方法。方法应用FRAX的中国大陆子模型软件,综合年龄、性别、体重指数,计算单一危险因子或多重危险因子在联合或不联合BMD的条件下预测骨折风险性。结果随着BMD下降、骨折危险因子增多,10年骨质疏松性骨折风险增大。不同骨折危险因子和BMD配对时骨折风险性不同,当BMD未达骨质疏松诊断标准而合并部分危险因子时的骨折风险性大于BMD的T值达-2.5SD但无危险因子时的骨折风险性。结论 FRAX模型使原来单凭BMD转向综合各类危险因子评估长期骨质疏松性骨折风险性,在无条件行BMD检测地区可用以筛查骨质疏松高危人群。  相似文献   

3.
目的观察阿仑膦酸钠预防骨质疏松性脊柱骨折患者再次骨折的作用。方法将80例骨质疏松性脊柱骨折患者随机分为治疗组及对照组,每组40例。2组均应用碳酸钙D3片及阿法骨化醇软胶囊做为基础用药,治疗组加用阿仑膦酸钠。分别于治疗开始前及治疗2年后.检测2组患者腰椎及左侧髋部双能X线骨密度(BMD),并测定血清I型胶原氨基末端肽(NTX)和骨钙素(OC)浓度,随访再次骨折的发生率。结果阿仑膦酸钠治疗组治疗2年,腰椎及左侧髋部BMD均不同程度提高,血清NTX及OC则不同程度降低,与治疗前相比差异有统计学意义(P〈0.05)。对照组BMD均不同程度下降,血清NTX及OC则不同程度升高,但无统计学意义(P〉0.05)。两组相比差异有统计学意义(P〈0.05)。2年治疗中,治疗组发生2例再次骨折事件,对照组发生8例再次骨折事件,两组相比差异有统计学意义(P〈0.05)。结论阿仑膦酸钠能够有效降低骨转换率、增加BMD,预防骨质疏松性脊柱骨折患者再次骨折的发生。  相似文献   

4.
骨质疏松性骨折的诊断与骨密度和骨微结构密切相关。双能X线吸收测定法和定量CT等为临床实践和研究提供了骨密度和骨微结构的测量方法,结合骨折预测工具(如骨折风险评估工具),可提高对高危人群骨折风险的识别。该文总结了骨质疏松性骨折的流行病学及诊治、影像学检测方式和骨折风险预测工具的进展,以早期识别高危人群的骨折风险,缩小日益扩大的治疗差距。  相似文献   

5.
骨转换指标和骨密度(BMD)对监测治疗骨质疏松及预测骨折的风险具有重要的临床意义。本文扼要综述了骨转换指标和BMD在治疗骨质疏松中的监测频率和最小显著变化(LSC),以及两者与骨折风险的关系,它对于指导临床监测治疗骨质疏松具有重要价值。  相似文献   

6.
目的 探讨经皮椎体成形术(percutaneous vertebroplasty, PVP)术后新发椎体压缩性骨折(vertebral compression fractures ,VCFs)的危险因素并建立与验证预测模型。方法 选取2016年6月至2018年6月,在柳州市人民医院脊柱外科接受PVP治疗并符合本研究纳入标准的骨质疏松性VCFs (osteoporotic VCFs,OVCFs)患者进行回顾性研究。观察指标为年龄、性别、骨密度 (bone mineral density, BMD)、身高、体重、体质量指数 (body mass index, BMI)、住院时间、骨水泥量、骨水泥是否渗漏、手术时间、住院到手术时间、受伤到手术时间、术后是否进行抗骨质疏松症治疗、是否多椎体骨折以及类固醇药物使用对PVP术后新的压缩性骨折的发生情况进行单因素和多因素分析,以确定相关的危险因素,并建立预测模型并进行验证。结果 共有385名患者符合纳入标准,其中女性308例,男性77例。随访时间24~36个月,平均26.4个月。在385例患者中观察到58例新发的OVCFs。统计学分析显示,较高的BMI(P<0.01)、较低BMD(P<0.01)、多椎体骨折(P<0.05)、未进行抗骨质疏松症治疗(P<0.05)与使用类固醇药物(P<0.001)是导致PVP术后新发OVCFs的独立危险因素。最明显的是,使用类固醇药物令新骨折的风险增加了4.07倍(95 % CI为2.005~8.264)。并进一步建立了临床预测模型(Nomogram)及其验证,其内部ROC=0.796;验证组进行外部验证ROC=0.648,提示该模型具有较好预测能力。结论 BMI、BMD、多椎体骨折、未进行抗骨质疏松症治疗与使用类固醇药物是PVP术后新发OVCFs高危因素。  相似文献   

7.
骨质疏松症的最大危害是骨折的发生。骨质疏松性骨折特别是髋部骨折会导致死亡率、致残率、致畸率和医疗费用的增加。因此进行骨折风险评估、预防骨质疏松性骨折的发生是骨质疏松诊治过程的关键内容。骨质疏松性骨折除了与骨密度的下降有关,还与年龄、体重指数、既往骨折史、父母骨折史、长期应用糖皮质激素、维生素D不足等危险因素相关。跌倒是骨折发生的重要诱因,因此防跌倒是预防骨折的重要内容。骨密度、FRAX巳经被证实可用于预测骨折风险,而QUS、QCT及骨转换生化标志物也可能用于骨折风险预测,但目前尚未得到肯定。本文试从DXA、FRAX、骨转换生化标志物、定量超声、定量CT、跌倒等方面来阐述对骨质疏松性骨折预测的研究进展,其目的是为了早期发现骨折的高危人群,通过相应干预措施降低骨折的发生。  相似文献   

8.
骨质疏松性脊柱骨折   总被引:14,自引:0,他引:14  
骨质疏松性脊柱骨折的发病率随着年龄的增加而迅速增长 ,也是再次发生骨折的危险因素 ,我们应该将BMD下降和初次骨折的发生结合起来评价骨折再次发生的危险程度 ,特别是对脊椎骨折的临床评估并没有足够的重视。放射学照像检查评估脊椎骨折是公认的方法 ,特别是具有高分辨率的侧位脊柱影像为脊椎骨折的评估与判断提高了可行的、低辐射的诊断方法。本文对不同评估方法进行了介绍。  相似文献   

9.
骨质疏松症是最为常见的一种代谢性骨病,骨质疏松骨折,又被称为脆性骨折,常发生于低于站立体位跌倒之后。骨质疏松骨折直接导致患者急慢性疼痛,活动受限,精神受挫,与髋部骨折相关联的患者的死亡率增加了大约20%。因此,以减少骨折发生风险为目的的骨质疏松治疗至关重要,但是,由于骨量丢失通常在无症状的情况下发生,甚至2/3的脊柱骨折不伴有临床症状,在诊疗中通常被忽视。显然,评估患者个体骨折风险,及时给予临床干预以期降低骨质疏松骨折发生风险至关重要。本文旨在对骨质疏松骨折风险评估进行综述。一、骨密度测量  相似文献   

10.
临床研究证实骨量减少不能完全预测骨折的风险,各个国家地区以及骨质疏松相关学科的专业学术团体也有着不同干预阈值标准。笔者回顾了国内外多篇骨质疏松诊疗指南和诊治原则,对比并总结了骨密度测定的临床指征、骨质疏松以及骨质疏松性骨折危险因子和不同的干预阈值标准。建议在选择采取骨质疏松及骨质疏松性骨折防治措施时,综合评估骨密度和骨质疏松及其骨折危险因素,共同预测骨质疏松症及其骨折的发生情况,从而在较为恰当的时机进行骨质疏松的干预措施与治疗并开展有效的随访。  相似文献   

11.
Increases in lumbar spine BMD account for 30-41% of the vertebral fracture risk reduction with teriparatide treatment. The remaining fracture risk reduction is caused by improvements in non-BMD determinants of bone strength. INTRODUCTION: Changes in BMD account for a small percentage of the fracture risk reduction seen in patients treated with antiresorptive drugs. The relationship between changes in lumbar spine BMD and vertebral fracture risk reduction with teriparatide treatment has not been assessed. MATERIALS AND METHODS: The relationship between spine BMD and the risk of new vertebral fractures after teriparatide treatment was assessed using data from the Fracture Prevention Trial. Postmenopausal women with osteoporosis (n = 1637) were randomized to placebo or teriparatide 20 or 40 microg/day for a median of 19 months. Spine BMD was assessed at baseline and 18 months. Vertebrae whose fracture status changed during the trial were removed from the calculation of BMD. Baseline and endpoint lateral spine radiographs were assessed using a visual semiquantitative technique. RESULTS: Both the baseline and change in spine BMD were contributors to vertebral fracture risk. The mean spine BMD increase in teriparatide-treated patients was 0.09 g/cm(2) across tertiles of baseline spine BMD. Compared with placebo, teriparatide significantly reduced the risk of new vertebral fracture for all endpoint BMD values. Teriparatide-mediated increases in spine BMD accounted for 30% (in the low baseline spine BMD tertile) to 41% (in the high baseline spine BMD tertile) of the reduction in vertebral fracture risk. CONCLUSIONS: Increases in BMD account for approximately one third of the vertebral fracture risk reduction seen with teriparatide. The majority of the risk reduction, however, results from improvements in non-BMD determinants of bone strength.  相似文献   

12.
Although low absolute values of bone mineral density (BMD) predict increased fracture risk in osteoporosis, it is not certain how well increases in BMD with antiresorptive therapy predict observed reductions in fracture risk. This work examines the relationships between changes in BMD after 1 year or 3 years of raloxifene or placebo therapy and the risk for new vertebral fractures at 3 years. In the Multiple Outcomes of Raloxifene Evaluation (MORE) trial, 7705 postmenopausal women with osteoporosis were randomized to placebo or raloxifene 60 mg/day or 120 mg/day. Relationships between baseline BMD and changes in BMD from baseline with the risk of new vertebral fractures were analyzed in this cohort using logistic regression models with the raloxifene doses pooled. As has been observed in other populations, women with the lowest baseline lumbar spine or femoral neck BMD in the MORE cohort had the greatest risk for vertebral fractures. Furthermore, for any percentage change, either increase or decrease in femoral neck or lumbar spine BMD at 1 year or 3 years, raloxifene-treated patients had a statistically significantly lower vertebral fracture risk compared with placebo-treated patients. The decrease in fracture risk with raloxifene was similar across the range of percentage change in femoral neck BMD observed at 3 years; patients receiving raloxifene had a 36% lower risk of vertebral fracture compared with those receiving placebo. At any percentage change in femoral neck and lumbar spine BMD observed at 1 year, raloxifene treatment decreased the risks of new vertebral fractures at 3 years by 38% and 41%, respectively. The logistic regression model showed that the percentage changes in BMD with raloxifene treatment accounted for 4% of the observed vertebral fracture risk reduction, and the other 96% of the risk reduction remains unexplained. The present data show that the measured BMD changes observed with raloxifene therapy are poor predictors of vertebral fracture risk reduction with raloxifene therapy.  相似文献   

13.
This paper aims to introduce a few alternative methodologies for prediction of vertebral fractures, the most common type being fragility fracture in the elderly. Current methods, such as DXA, for diagnosing osteoporosis and predicting the risk of vertebral failure, are often not accurate thereby preventing those patients at risk from receiving adequate treatment. Robust fracture prediction models for vertebral fracture risk should not only include BMD, as measured by DXA, but should incorporate a wide range of factors including bone geometry, bone mineral distribution within the vertebral body, daily living activities, and spine musculature. One promising technique is finite element modeling, which has been developed over the past several decades and implements clinical imaging, such as quantitative computed tomography (QCT), and engineering fundamentals to more accurately predict the risk of fracture. Other imaging tools that assess bone mineral distribution and structure at the microscopic level include micro-CT or high-resolution peripheral QCT (HR-pQCT). These newer techniques hold the promise of more accurate diagnosis of osteoporosis and those at risk for vertebral insufficiency fractures before they occur.  相似文献   

14.
INTRODUCTION: Teriparatide is a bone formation agent that increases bone turnover and mass, resulting in an increase in bone strength and a decrease in fracture risk. METHODS: The primary purpose of this analysis was to evaluate the association between pretreatment bone turnover marker (BTM) concentrations and the absolute and relative fracture risks after adjusting for baseline femoral neck BMD, number of prevalent vertebral fractures, and age. Because femoral neck BMD is commonly attained in the assessment of patients at risk for osteoporosis, we examined the ability of a multivariate assessment including pretreatment BTM concentration and femoral neck BMD to predict future fracture risk after adjusting for the number of prevalent vertebral fractures. We examined data from the Fracture Prevention Trial, a study designed to determine the effect of teriparatide 20 mcg/day and teriparatide 40 mcg/day on vertebral and nonvertebral fracture risk in postmenopausal women with osteoporosis. BTM were analyzed in two subsets of women within the Fracture Prevention Trial, and included serum bone-specific alkaline phosphatase (BSAP), serum carboxy-terminal extension peptide of procollagen type I (PICP), serum amino-terminal extension peptide of procollagen type I (PINP), urinary free deoxypyridinoline (DPD), and urinary N-terminal telopeptide (NTX). RESULTS: Teriparatide significantly reduced the risk of fracture [four BTM subset (n = 520), placebo = 14.3%, teriparatide = 5.8%, P < 0.05; PINP subset (n = 771), placebo = 17.7%, teriparatide = 5.5%, P < 0.05]. Subjects with the highest pretreatment BTM concentrations had the greatest fracture risk. Teriparatide-mediated absolute risk reduction was greatest for women with high pretreatment bone turnover; however, the relative fracture risk reduction was independent of pretreatment bone turnover. After adjusting for pretreatment BTM and number of prevalent vertebral fractures, baseline femoral neck BMD was not a significant predictor of fracture risk. CONCLUSION: Teriparatide-mediated relative fracture risk reduction was independent of pretreatment bone turnover, demonstrating that this therapy offers clinical benefit to patients across a range of disease severity.  相似文献   

15.
Raloxifene reduces vertebral fracture risk in postmenopausal women with osteoporosis and established osteoporosis, but its efficacy in women with osteopenia has not been studied. The objective of this study was to evaluate the effect of raloxifene hydrochloride on the risk of vertebral fractures in postmenopausal women with osteopenia and to compare this effect with that in women with osteoporosis as defined by the bone mineral density (BMD) T-score at the hip. We studied the 3204 postmenopausal women with osteopenia or osteoporosis without vertebral fractures at baseline in the Multiple Outcomes of Raloxifene Evaluation trial. Compared with placebo, 60 mg/day raloxifene reduced the risk of new vertebral fractures at 3 years independent of baseline total hip BMD. The relative risk for new vertebral fractures for the raloxifene group compared with placebo was 0.53 (95% CI, 0.32-0.88) for those with osteopenia and 0.31 (0.06-0.71) for those with osteoporosis. In raloxifene-treated women the rate of vertebral fracture was similar in women with osteoporosis (2%) to that in women with osteopenia (1.9%). For clinically apparent vertebral fractures, the relative risk of fracture in the osteopenia group for raloxifene was 0.25 (0.04-0.63) compared with placebo. There were no new clinical vertebral fractures in women with osteoporosis receiving raloxifene, whereas four occurred in the placebo group. We conclude that treatment with 60 mg/day raloxifene significantly decreases the risk of new vertebral fractures and new clinical vertebral fractures in postmenopausal women without baseline vertebral fracture who have osteopenia or osteoporosis.  相似文献   

16.
Vertebral fractures are the most common osteoporotic fracture and are associated with significant pain and disability. Prior vertebral fracture and low bone mineral density (BMD) are strong predictors of new vertebral fracture. Using data from 6082 women, ages 55-80 years, in the Fracture Intervention Trial (a randomized, placebo-controlled trial of the antiresorptive agent, alendronate), we explored the association of the number of prior vertebral fractures with the risk of new fractures and whether this association is influenced by the spinal location of fractures. The risk of future vertebral fractures increased with the number of prevalent fractures, independently of age and BMD; in the placebo group, more than half of the women with five or more fractures at baseline developed new vertebral fractures, compared to only 3.8% of women without prior vertebral fractures. The magnitude of association with an increased risk of future vertebral fractures was equal for prevalent fractures located in either the "lower" (T12-L4) (relative risk [RR] = 2.9; 95% CI = 1.9, 3.6) or "upper" (T4-10) spine (RR = 2.6; 95% CI = 1.9, 3.6). We found no evidence that the effectiveness of alendronate in reducing the risk of future vertebral fracture was attenuated in women with up to five or more prevalent fractures, or that it varied by the location of prevalent fractures. However, prevalent vertebral fractures in any location were more strongly associated with risk of new fractures in the upper (RR = 5.2; 95% CI = 3.2, 8.3) than in the lower spine (2.3; 1.6, 3.3). In addition, each 1 SD decrease in spinal BMD was associated with a 2.1 (1.7, 2.6) times greater odds of new fracture in the upper spine, compared with 1.5 (1.3, 1.8) for the lower spine. These findings suggest that, in older women, osteoporosis may be a stronger risk factor for new fractures in the upper (vs. lower) thoracolumbar spine, although we found no evidence that the location of prior fractures should influence treatment decisions. Physicians should recognize that prior vertebral fractures are a strong risk factor for future fractures, and consider treating such patients to reduce their risk of subsequent fractures.  相似文献   

17.
Denosumab reduces the risk of new vertebral and nonvertebral fractures. Previous trials suggest that the efficacy of antiresorptives on fractures might differ by patients' characteristics, such as age, bone mineral density (BMD), and fracture history. In the FREEDOM study, 7808 women aged 60 to 90 years with osteoporosis were randomly assigned to receive subcutaneous injections of denosumab (60 mg) or placebo every 6 months for 3 years. New vertebral and nonvertebral fractures were radiologically confirmed. Subgroup analyses described in this article were prospectively planned before study unblinding to evaluate the effect of denosumab on new vertebral and nonvertebral fractures across various subgroups. Compared with placebo, denosumab decreased the risk of new vertebral fractures in the overall study population over 3 years. This effect did not significantly differ for any of the nine subgroups analyzed (p > 0.09 for all potential interactions). Denosumab also reduced all nonvertebral fractures by 20% in the full study cohort over 3 years. This risk reduction was statistically significant in women with a baseline femoral neck BMD T‐score ≤ ?2.5 but not in those with a T‐score > ?2.5; in those with a body mass index (BMI) < 25 kg/m2 but not ≥ 25 kg/m2; and in those without but not with a prevalent vertebral fracture. These differential treatment effects were not explained by differences in BMD responses to denosumab. Denosumab 60 mg administered every 6 months for 3 years in women with osteoporosis reduced the risk of new vertebral fractures to a similar degree in all subgroups. The effect of denosumab on nonvertebral fracture risk differed by femoral neck BMD, BMI, and prevalent vertebral fracture at baseline. © 2012 American Society for Bone and Mineral Research  相似文献   

18.

Summary

This study evaluated the characteristics of patients with vertebral fractures and examined the discriminative ability of clinical risk factors. The findings provide further insights into possible development of a simple, cost-effective scheme for fracture risk assessment using clinical risk factors to identify high-risk patients for further evaluation.

Introduction

Vertebral fractures are the most common complication of osteoporosis. The aim of this study was to evaluate the characteristics of patients with vertebral fractures and to determine the discriminative ability of bone mineral density (BMD) and other clinical risk factors.

Methods

Postmenopausal Southern Chinese women (2,178) enrolled in the Hong Kong Osteoporosis Study since 1995 were prospectively followed up for fracture outcome. Subjects (1,372) with lateral spine radiographs were included in this study. Baseline demographic, BMD, and clinical risk factor information were obtained from a structured questionnaire.

Results

Subjects (299; 22%) had prevalent vertebral fractures. The prevalence of vertebral fractures increased with increasing age, number of clinical risk factors, and decreasing BMD. The odds of having a prevalent vertebral fracture per SD reduction in BMD after adjustment for age in Hong Kong Southern Chinese postmenopausal women was 1.5 for the lumbar spine and femoral neck. Analysis of the receiver operating characteristic curve revealed that bone mineral apparent density did not enhance fracture risk prediction. Subjects with ≥4 clinical risk factors had 2.3-fold higher odds of having a prevalent vertebral fracture while subjects with ≥4 clinical risk factors plus a low BMD (i.e., femoral neck T-score <?2.5) had 2.6-fold. Addition of BMD to clinical risk factors did not enhance the discriminative ability to identify subjects with vertebral fracture.

Conclusions

Based on these findings, we recommend that screening efforts should focus on older postmenopausal women with multiple risk factors to identify women who are likely to have a prevalent vertebral fracture.  相似文献   

19.
《The spine journal》2022,22(10):1634-1641
BACKGROUND CONTEXTNormal bone mineral density (BMD) as measured by dual-energy x-ray absorptiometry (DXA) is present in approximately 10% of older adults with fracture. BMD alone does not evaluate bone quality or clinical risk factors, and therefore, may not adequately capture a patient's fracture risk. Thus, despite a normal DXA-measured BMD, the underlying bone may be abnormal, suggesting that further bone health evaluation, and potentially, pharmacologic treatment may be warranted.PURPOSETo determine the prevalence of normal BMD, clinical fracture risk factors, and quantitative risk of fracture using the Fracture Risk Assessment Tool (FRAX) in vertebral fracture patients with normal BMD enrolled in the Own the Bone registry, thus facilitating identification of those who meet criteria for anti-osteoporosis therapy.STUDY DESIGN/SETTINGRetrospective, national registry-based cohort.PATIENT SAMPLEFrom July 2016 to July 2021, 1,807 patients age ≥50 who sustained a vertebral fracture and had DXA data available from within 2 years prior to enrollment in the American Orthopaedic Association's Own the Bone (AOA OTB) registry were included.OUTCOME MEASURESWorld Health Organization (WHO) DXA T-score based bone classification criteria; FRAX risk scores of major osteoporotic fracture or hip fracture.METHODSDemographic data, prior fracture site, and clinical fracture risk factors were collected. BMD status was classified by the WHO T-score criteria: ≥ -1.0 normal, -1.1 to -2.4 osteopenia, and ≤ -2.5 osteoporosis, with low bone mass including either osteopenia or osteoporosis. In normal BMD patients, FRAX scores were calculated with and without BMD, with the treatment threshold defined as a major osteoporotic fracture risk ≥20% or hip fracture risk ≥3%.RESULTSMean±SD age was 72.0±9.7, 78.1% were female, and 92.4% were Caucasian. Normal BMD was present in 7.9%. Clinical fracture risk factors including alcohol use ≥3 units/day and history of ≥2 falls in the year prior to enrollment were more common in normal BMD (11.2% and 28%, respectively) compared to low bone mass patients (3.4% and 25.2%, respectively). A prior vertebral fracture had occurred in 49.5% with normal BMD compared to 45.8% with low bone mass, while a prior non-major osteoporotic fracture occurred in 28.9% and 29.3% of normal BMD and low bone mass patients, respectively. In normal BMD patients, either a prior fracture or FRAX risk with BMD meeting treatment thresholds was present in 85%.CONCLUSIONSClear indications for receipt of pharmacologic therapy, ie, prior fracture or elevated fracture risk, were present in most patients with vertebral fracture and normal BMD enrolled in the AOA OTB. Prior non-major osteoporotic fractures were common and may be useful indicators of underlying bone disease. Surgeons must recognize that other important risk factors apart from BMD may indicate poor bone health, and thus, help guide further bone health evaluation.  相似文献   

20.
The change in BMD is a poor predictor of vertebral fracture risk after raloxifene treatment. One-year percent change in bone turnover and BMD was used to predict vertebral fracture risk. The percent change in osteocalcin was determined to be a better predictor of vertebral fracture risk than BMD. INTRODUCTION: The association between baseline BMD and fracture risk is well understood. However, the relationship between changes in BMD and fracture risk is not well defined. It has previously been demonstrated that BMD change was a poor predictor of vertebral fracture risk in raloxifene-treated women, whereas bone turnover markers were significantly associated with fracture risk. In the current analysis, we explore the prediction of vertebral fracture risk using changes in both BMD and bone turnover. MATERIALS AND METHODS: The Multiple Outcomes of Raloxifene Evaluation (MORE) trial was a randomized, placebo-controlled trial of 7705 women with osteoporosis treated with raloxifene 60 or 120 mg/day for 3 years. Markers of bone turnover were measured in one-third of the study population (n = 2503), and the present analyses include these women. Logistic regression models were constructed using one-year percent changes in BMD and bone turnover and relevant baseline demographics to predict the risk of vertebral fracture with pooled raloxifene therapy at 3 years. All covariates were standardized before modeling to facilitate direct comparisons between changes in BMD and bone turnover. RESULTS AND CONCLUSION: Prevalent vertebral fracture status (p < 0.0001), baseline lumbar spine BMD (p < 0.0001), and number of years postmenopausal (p = 0.0005) were independent predictors of fracture risk in raloxifene-treated patients. Therapy-by-change in femoral neck BMD (p = 0.02) and therapy-by-change in osteocalcin (OC; p = 0.01) were also significant for all treatment groups, indicating that changes in BMD and OC have different effects on fracture risk for the placebo and pooled raloxifene groups. The final model included significant baseline variables and change in OC (p = 0.01), whereas change in femoral neck BMD was not significant. After adjustment of each significant baseline variable, the percent change in OC was better able to predict the reduction in vertebral fracture risk than the percent change in femoral neck BMD in patients treated with raloxifene.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号